Influence of Annealing Temperature on Magnetic Properties in Co-Based Amorphous Ribbons

2004 ◽  
Vol 449-452 ◽  
pp. 1049-1052
Author(s):  
Li Jin ◽  
Y.W. Rheem ◽  
Cheol Gi Kim ◽  
De Sheng Sun ◽  
Chong Oh Kim ◽  
...  

The magnetic properties were investigated on Co66Fe4B15Si15 amorphous ribbons of annealed at temperature range from 473 K to 773 K in vacuum (A-batch) and open air (B-batch). Static permeability from domain wall motion decreases with annealing temperature both in A- and B-batch sample. The permeability from magnetization rotation increases up to 700 K annealing temperature, but then decreases. The GMI profiles show a symmetric curve in A-batch samples irrespective of annealing temperature. In B-batch samples, symmetric profiles are shown up to 650 K annealing temperature, while they becomes asymmetric for further annealing temperature, due to the exchange bias-field induced by surface crystalline layer.

2004 ◽  
Vol 449-452 ◽  
pp. 1045-1048 ◽  
Author(s):  
Naoki Kamegashira ◽  
Hirohisa Sato ◽  
Satoshi Ashizuka

The magnetic properties were investigated on Co66Fe4B15Si15 amorphous ribbons of annealed at temperature range from 473 K to 773 K in vacuum (A-batch) and open air (B-batch). Static permeability from domain wall motion decreases with annealing temperature both in A- and B-batch sample. The permeability from magnetization rotation increases up to 700 K annealing temperature, but then decreases. The GMI profiles show a symmetric curve in A-batch samples irrespective of annealing temperature. In B-batch samples, symmetric profiles are shown up to 650 K annealing temperature, while they becomes asymmetric for further annealing temperature, due to the exchange bias-field induced by surface crystalline layer.


1996 ◽  
Vol 53 (6) ◽  
pp. 3336-3340 ◽  
Author(s):  
X. X. Zhang ◽  
J. M. Hernàndez ◽  
J. Tejada ◽  
R. Solé ◽  
X. Ruiz

Author(s):  
Soyoung Jekal ◽  
Dao Phoung

The perpendicular exchange bias effect is observed in the ferromagnetic Co/Ni multilayers adjacent to the antiferromagnetic FeRh layer. It is found that as the antiferromagnetic FeRh thickness increases from 10 Å to 50 Å, the hysteresis loop is gradually changed from the symmetric shape to the asymmetric shape shifted by some amount corresponding to the exchange-biased field at the thickness of 25 Å. Also, the magnetic domain observation experiment confirms that the domain reversals in the increasing and the decreasing field regions of the sample with the thickness of 50 Å exhibit the same single domain wall motion even though they have the different coercivities.


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